Derailleur News

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AMuzi

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Nov 18, 2021, 1:19:44 PM11/18/21
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Those crazy innovative humans !

https://bikerumor.com/lal-bikes-supre-drive-splits-the-traditional-derailleur-for-high-pivot-mountain-bikes/
--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971

Sir Ridesalot

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Nov 18, 2021, 1:31:57 PM11/18/21
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Look at all those nice moving parts to catch a pant leg in.

Cheers

Frank Krygowski

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Nov 18, 2021, 1:55:50 PM11/18/21
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On 11/18/2021 1:19 PM, AMuzi wrote:
> Those crazy innovative humans !
>
> https://bikerumor.com/lal-bikes-supre-drive-splits-the-traditional-derailleur-for-high-pivot-mountain-bikes/

To borrow Jeff's word: It looks complexicated! The aesthetic opposite of
a single speed, eh?

But the derailleur portion does look more protected. I was kind of
intrigued by one brief SunTour attempt at mounting the derailleur ahead
of the axle and sort of inboard of the right chainstay, like a Nivex.

(Why do I waste brain space by knowing "Nivex"?)


--
- Frank Krygowski

AMuzi

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Nov 18, 2021, 2:28:21 PM11/18/21
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Or the always creative Oscar Egg with his Osgear:
https://www.speedbicycles.ch/velo/528/speed_077.jpg

jbeattie

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Nov 18, 2021, 2:29:16 PM11/18/21
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On Thursday, November 18, 2021 at 10:19:44 AM UTC-8, AMuzi wrote:
> Those crazy innovative humans !
>
> https://bikerumor.com/lal-bikes-supre-drive-splits-the-traditional-derailleur-for-high-pivot-mountain-bikes/

I saw that story in a different news feed from pinkbike: https://www.pinkbike.com/news/first-look-lal-bikes-supre-drive-splitting-a-derailleur-in-half-before-it-happens-on-the-trail.html The comments are far more insightful and many are positive. I guess ruining a RDs is a common thing for the Enduro/DH set. It has no use on a road bike, or at least no benefit that outweighs the complexity.

-- Jay Beattie.

Frank Krygowski

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Nov 18, 2021, 3:27:13 PM11/18/21
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Hmm. I don't know anything about that one.


--
- Frank Krygowski

Ralph Barone

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Nov 18, 2021, 3:32:08 PM11/18/21
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Why would somebody take a picture of a derailleur from the non drive side?

AMuzi

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Nov 18, 2021, 4:29:37 PM11/18/21
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Channeling Oscar Egg maybe? Everyone else does it the other
way around. That's reason enough!

Tom Kunich

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Nov 18, 2021, 6:35:11 PM11/18/21
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+1

Rolf Mantel

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Nov 19, 2021, 4:29:05 AM11/19/21
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Am 18.11.2021 um 19:55 schrieb Frank Krygowski:
> On 11/18/2021 1:19 PM, AMuzi wrote:
>> Those crazy innovative humans !
>>
>> https://bikerumor.com/lal-bikes-supre-drive-splits-the-traditional-derailleur-for-high-pivot-mountain-bikes/
>
> To borrow Jeff's word: It looks complexicated! The aesthetic opposite of
> a single speed, eh?

Also, thinking of efficiency, the main advantage of the traditional
derailleur design is the straight chain route on the power side where
all "frills" are on the return side.

On my ZOX FWD recumbent, the big "chain deflector" is also a massive
cause of noise.

Tom Kunich

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Nov 19, 2021, 10:32:31 AM11/19/21
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But there is clearly a reason for it. Apparently downhill racers were throwing chains because of the differential length of the chain over the length of suspension. Though I would think that they could come up with a better answer.

Simon S Aysdie

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Nov 19, 2021, 5:48:12 PM11/19/21
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On Thursday, November 18, 2021 at 10:19:44 AM UTC-8, AMuzi wrote:
That's a lot of chain wrap.

Tom Kunich

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Nov 19, 2021, 5:52:36 PM11/19/21
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Agreed but you can see that the chain doesn't sustain any stretching loads from the motion of the suspension. Or very little.

Ralph Barone

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Nov 19, 2021, 11:23:51 PM11/19/21
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On the plus side, the more chain you have, the longer it takes to wear it
out.

Tom Kunich

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Nov 20, 2021, 10:48:46 AM11/20/21
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On the minus side - the more expensive it is to replace.
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